Yes, you may maintain your current health care coverage. Your current insurer will be the primary payer and the AmeriCorps Health Benefit Plan will be the secondary payer. All claims should be sent to your primary payer (your current coverage) first.
If you have coverage through Medicare or Medicaid, that will be secondary and the AmeriCorps Health Benefit Plan will be primary. All claims should first go to the AmeriCorps Health Benefits Plan.